AD9833 / AD5932 Interface
This project describes howto create a waveform generator with an AVR Microcontroller and an Analog Devices DDS circuit.
The AD9833 is a programmable waveform generator capable of producing sine, triangular and square wave output signals up to 12.5 MHz (clocked with 25MHz).
The Interface Boards contains all basic components the DDS Chips needs to run. If you compare the component count with that of a MAX038 circuit you will see, that there are less here.
In the top-corner of the board you find the power connector (”Key Lock”). Next to it the BNC Connector for the Output signal. The 3-pin connector for the serial interface is located at the bottom of the Board. For a first basic test of operation connect the serial interface to your computers parallel port and use the software provided by Analog Devices (the schematic for the parallel port connection can be found in the AD9833 Datasheet. You can connect the pins directly without the use of the 74HC744 8bit Latch).
Connecting the AD9833/AD5932 to a ATMEL AVR:
comming soon, work in progress.
The AD5932:
The AD5932 can be seen as the next generation of the AD9833. The max. Outputfrequency has been doubled and additional Pins have been added. The AD5932 can produce sine, triangular and square waves from 0 to 25MHz with 28bit resolution.
Creating a programmable Gain Amplifier (PGA):
The get a full functional waveform generator some analog parts to adjust Amplitude and Offset are required. This is the really tricky part of the project. If’ve started with two OPAMPS and a Digipoti to get a PGA (I haven’t tested my circuit by now). At the moment i’m thinking of using the VCA810 from TI, some OPAMPS and maybe a Digipoti or an voltage output DAC.
Downloads / Schematics:
AD9833 Interface Board:
AD5932 Board with PGA:
SPI -> PGA Interface:
February 13th, 2007 at 13:14
i wan to make a single scan waveformgenerator which will generate a frequency from7.5MHZ-22.5MHZ with the help of a ATMEGA8535 microcontroller.so i want your help.
February 13th, 2007 at 13:20
Sorry but I never finished the project. I only did the schematics drawings and some tests. For this I used the Windows Software provided by Analog for Interfacing the AD9833. So for your project you will have to use the AD5932…
July 30th, 2007 at 07:43
Neat! I am playing with the AD5932. Interfacing to the Ardunio to make a bench USB controlled function generator. Found your site when I went looking for some sample source code. I am haveing troube getting the device configured. I dont want a scan right now, just a fixed frequency output… Do you have any source code which could give me a clue?
August 15th, 2008 at 07:22
hello,i am now playing with AD5932,but i have a lot of trouble,could you please,help me ang give me the source code and the schematics drawings ,thankl you very much!
October 18th, 2008 at 09:17
Hi, i am also testing AD5932 some weeks before ,but fail until now ,
By the way ,i want to get 18MHz to 19.2MHz sweep signal ,thanks.
December 31st, 2008 at 07:57
Hello,
i want to make a triangular wave generator using AD9833 the wave will have a variable frequency also i want to interface a PIC16f84a with the AD9833 to controll it could any one help please
best wishes
Somdeb